* src/glade/gramps.glade: remove internal from addmedia
* src/AddMedia.py: remove internal
* src/Editors/_EditMedia.py: remove internal note code
Note: no upgrade code for this. Old internal notes will be connected to
a media object with type 'Note' and have as type 'Media Note',
up to the case a user deletes these media and changes note type to eg
report or changes the path to a real media object.
svn: r9418